Australian actress Pia Miller has been photographed drafting a lengthy and emotional message in her notes app following her split from fiancé Tyson Mullane.

The 35-year-old Bite Club star was papped while on a beach stroll on June 2.

"I was so hurt when I heard that you were badmouthing me — it propelled me into a state of complete disassociation and contempt," the note read. "I appreciate that you followed it up and sought to rectify it — but I did too and she swears that you were indeed saying that I was a psycho and that you... 'dodged a bullet' at Orchard St."

The recipient of the message is unclear.

Pia Miller. (Instagram)

Miller is believed to have recently split up with her fiancé, Tyson Mullane, after more than three years of dating. The pair began a relationship in late 2015, before becoming engaged in November 2017. They reportedly split up earlier this year, and both parties unfollowed each other on social media and removed references of their engagement from their Instagram accounts.

"When you travel alone, you carry each experience with you like a secret, something you write on your heart, because there's no other way to preserve it," she quoted in her caption, before adding that she was, "So grateful to have some solo exploration time off the back of shooting an amazing project. Can't wait to share more."